Police have launched a manhunt after three adults and a child were shot in Brent last night.
Officers attended along with London Ambulance Service where they discovered four people suffering gunshot injuries.
Three of the injured have been identified as adults and one is a young child.
All four have been taken by ambulance to hospital.
The severity of their condition is unknown.
There has been no arrest at this stage and enquires continue to establish the circumstances.
An order is in place which allows police officers to stop and search.
The incident occurred just a few metres from a block party on Tuesday, police were sent in to break up a huge street party in northwest London after several hundred revellers ignored the lockdown to gather in public.
The Met Police says at least one person was arrested at the event on Gifford Road in Stonebridge.
Video taken on Snapchat by one attendee of the rave was shared widely on Twitter, sparking fury.
Sharing the clip, Lisa Blanco, who lives nearby, tweeted at the Brent Met Police branch, her local MP Dawn Butler and Brent Council, writing: "Seriously? This is happening on Church Road Harlesden right now!
"Can hear helicopters above. Guess no one gets any sleep tonight. Selfish idiots."
A further video posted online shows police officers being jeered and filmed on their phones to come and break up the party.
Reports say police helicopters had been circling overhead all night after the area was cleared.
Police responded to the impromptu party, which residents report is the second such event in Harlesden in just a few days.
Any witnesses or anyone with information should call police on 101 quoting reference 8326/03june. To remain anonymous, please contact the independent charity Crimestoppers.
Please refresh the page regularly to get the latest updates.
Reporters working on dailystar.co.uk will be working to source the latest information, reaction, pictures and video related to this story.
Or download the Daily Star app for flash alerts on the biggest stories of the day.
Why not also subscribe to receive our regular Daily Star news bulletins? You can do this on this page by simply entering your email address above and hitting 'subscribe'.